Jason Owen walks past an open door, May 23, 2013, as he helps his mother salvage items from her uncle's tornado-damaged home in Moore, Okla. The tornado was the strongest in the United States in nearly two years and cut a path of destruction 17 miles long and 1.3 miles wide. Storm experts said it was remarkable that only 24 people were killed, as tornadoes of this strength can blow away a well-constructed brick or wood house.